Method for cooling a thermoreactor and system thereof

ABSTRACT

A method for cooling a thermoreactor and system thereof, having a noncombustible function for chemical materials pyrolysis in a hot thermoreactor that also lowers the temperature inside the hot thermoreactor, and a method for exhausting pyrolysis oil gas from a thermoreactor after batch type heating, pouring N 2  or inert gas into the thermoreactor for cooling the gas until the thermoreactor achieves a predetermined pressure, and finally circulating cooling from thermoreactor; the system equipment includes a thermoreactor, a heat exchanger, a mixed gas thermoreactor, a circulation pump and a greaves settling thermoreactor.

BACKGROUND OF THE INVENTION

1. Field of the Invention

The present invention relates to a method for cooling a thermoreactor and system thereof, and more particularly, to a noncombustible chemical materials pyrolysis in a hot thermoreactor that lowers its temperature by using N₂ or inert gases with middle-low temperature characteristics and a surrounding heat exchanger.

2. Description of Related Art

A thermoreactor for refuse batch heating, in which refuse fiber or plastic is first added into a thermoreactor, and heated to a high temperature, or pyrolysis refuse is added with a catalyst to recycle the oil gas using the batching method. However, this method has suffers from the problems of reaching too higher temperatures and being highly flammable.

After batch heating and recycling the oil gas, the thermoreactor communicates with a heat exchanger for directly cooling the thermoreactor. However, this method has the drawback of often causing the thermoreactor to burst.

Inert gas is the best choice for creating a noncombustible environment and can be poured to a thermoreactor to dilute oil gas to create a noncombustible environment. Using N₂ is the preferred embodiment of this invention for achieving a noncombustible environment.

Accordingly, as discussed above, the prior art still has some drawbacks that could be improved upon. The present invention aims to resolve the drawbacks of the prior art.

SUMMARY OF THE INVENTION

An objective of the present invention is to provide a method for cooling a thermoreactor and system thereof, which is noncombustible.

For reaching the above objective, the present invention provides a method for pouring N₂ or an inert gas as a cooling medium with two stages of cooling. The first is by press cooling a noncombustible gas and the second is cooling by heat exchange circulation.

The system of the present invention includes: a thermoreactor, having an entry hole for N₂ or an inert gas and an exhaust hole for the mixed oil gas; a heat exchanger, having a frame for the refrigerant to mix oil gas for heat exchanging; a mixed gas storage thermoreactor, having an entry and an exhaust hole for the cooling mixed oil gas; and a circulation pump, connecting the thermoreactor and the heat exchanger and the mixed gas storage thermoreactor; wherein the circulation pump connects to the thermoreactor and the heat exchanger, forming a first circulating cooling circuit.

The method of the present invention includes: (1) exhausting pyrolysis oil gas from the thermoreactor until the thermoreactor achieves a predetermined pressure or temperature after batch type heating; (2) pouring N2 or inert gas into the thermoreactor for cooling the oil gas until the thermoreactor achieves a predetermined pressure or concentration; and (3) circulating cool water from the thermoreactor connected with the heat exchanger until the thermoreactor achieves a predetermined lower temperature range.

Numerous additional features, benefits and details of the present invention are described in the detailed description, which follows.

BRIEF DESCRIPTION OF THE DRAWINGS

The foregoing aspects and many of the attendant advantages of this invention will be more readily appreciated as the same becomes better understood by reference to the following detailed description, when taken in conjunction with the accompanying drawings, wherein:

FIG. 1 is a flowchart of a method of the present invention;

FIG. 2 is a schematic view of a method for cooling a thermoreactor and system thereof of the present invention; and

FIG. 3 is a schematic view of an embodiment of the method for cooling a thermoreactor and system thereof of the present invention.

DETAILED DESCRIPTION OF PREFERRED EMBODIMENTS

The embodiments of the present invention have a simple type (FIG. 2) and a complex type (FIG. 3). A method is provided for pouring N₂ and inert gas as a cooling medium and two methods for cooling. The first is press cooling by pouring in a noncombustible gas. The second is cooling by heat exchanger circulation. Refer to the flowchart of FIG. 1 showing a special operating condition. The valve 42 has a sign with reference marks such as Bx, Mx, Hx, Yx, Ix, and so on of an engineering chart for identification.

The method of the present invention includes: (1) exhausting pyrolysis oil gas from the thermoreactor 10 until the thermoreactor 10 achieves a predetermined pressure or temperature after batch type heating; (2) pouring N2 or inert gas 50 into the thermoreactor 10 for cooling the gas until the thermoreactor 10 achieves a predetermined pressure or concentration; and (3) circulating cooling from the thermoreactor 10 connected to a heat exchanger 20 until the thermoreactor 10 achieves a predetermined lower the temperature range.

The method of the present invention includes: wherein the step (1) the predetermined pressure range is 1.3 to 0.7 atm; wherein the step (1) the predetermined temperature range is 300° C. to 600° C.; wherein the step (2) the predetermined pressure range is 2.6 to 1.4 atm; wherein the heat exchanger is ice water to gas for heat exchanging; wherein the predetermined lowered temperature range is 80° C. to 40° C.

The system of the present invention includes: a thermoreactor 10, having an entry hole for N2 or an inert gas 50 and an exhaust hole for the mixed oil gas; a heat exchanger 20, having a frame for the refrigerant to mix oil gas for heat exchanging; a mixed gas storage thermoreactor 30, having an entry and an exhaust hole for cooling mixed oil gas; and a circulation pump 40, connecting the thermoreactor 10 and the heat exchanger 20 and the mixed gas storage thermoreactor 30; wherein the circulation pump 40 connects to the thermoreactor 10 and the heat exchanger 20, forming the first circulating cooling circuit.

The details of the system of the present invention includes: wherein the circulation pump 40 connected to the thermoreactor 10, the heat exchanger 20 and the mixed gas storage thermoreactor 30, forms the second circulating cooling circuit; wherein it further includes a greaves settling thermoreactor 60 connected to the thermoreactor 10; wherein the refrigerant of the heat exchanger 20 is ice water or cool water; wherein the heat exchanger 20 has two-stages for cooling the mixed oil gas, the first stage using ice water and the second stage using cool water.

The present invention has the following advantages: (1) it is easy to produce and the price of the required equipment and technique is low, (2) the cost of N₂ is also low, (3) it is design for use with a batch thermoreactor.

Although the present invention has been described with reference to the preferred embodiment thereof, it will be understood that the invention is not limited to the details thereof. Various substitutions and modifications have been suggested in the foregoing description, and others will occur to those of ordinary skill in the art. Therefore, all such substitutions and modifications are embraced within the scope of the invention as defined in the appended claims. 

1. A method for cooling a thermoreactor, comprising: (1) exhausting pyrolysis oil gas from the thermoreactor until the thermoreactor achieves a predetermined pressure or temperature after batch type heating; (2) pouring N₂ or an inert gas into the thermoreactor to cool the oil gas until the thermoreactor achieves a predetermined pressure or concentration; and (3) circulating cooling from the thermoreactor connected to a heat exchanger until the thermoreactor achieves a predetermined lower temperature range.
 2. The method as claimed in claim 1, wherein in the step (1) the predetermined pressure range is 1.3 to 0.7 atm.
 3. The method as claimed in claim 1, wherein in the step (1) the predetermined temperature range is 300° C. to 600° C.
 4. The method as claimed in claim 1, wherein in the step (1) the predetermined pressure range is 2.6 to 1.4 atm.
 5. The method as claimed in claim 1, wherein the heat exchanger is ice water to gas for heat exchanging.
 6. The method as claimed in claim 1, wherein the predetermined lowered temperature range is 80° C. to 40° C.
 7. A system for cooling a thermoreactor, comprising: A thermoreactor, having an entry hole for the N₂ or an inert gas and an exhaust hole for the mixed oil gas; a heat exchanger, having a frame for a refrigerant to mix with the oil gas for heat exchanging; a mixed gas storage thermoreactor, having an entry and an exhaust hole for the cooling mixed oil gas; and a circulation pump, connecting the thermoreactor and the heat exchanger and the mixed gas storage thermoreactor; wherein the circulation pump connecting the thermoreactor and the heat exchanger, forms the first circulating cooling circuit.
 8. The system as claimed in claim 7, wherein the circulation pump connecting the thermoreactor, the heat exchanger and the mixed gas storage thermoreactor, forms the second circulating cooling circuit.
 9. The system as claimed in claim 7, further includes a greaves settling thermoreactor connected to the thermoreactor.
 10. The system as claimed in claim 7, wherein the refrigerant of the heat exchanger is ice water or cool water.
 11. The system as claimed in claim 10, wherein the heat exchanger has two-stages of cooling the mixed oil gas, the first using ice water and the second using cool water. 